EP1223427A1 - Trennsäule zum Untersuchen von Gasen - Google Patents
Trennsäule zum Untersuchen von Gasen Download PDFInfo
- Publication number
- EP1223427A1 EP1223427A1 EP01129505A EP01129505A EP1223427A1 EP 1223427 A1 EP1223427 A1 EP 1223427A1 EP 01129505 A EP01129505 A EP 01129505A EP 01129505 A EP01129505 A EP 01129505A EP 1223427 A1 EP1223427 A1 EP 1223427A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- balls
- capillary
- gas
- diameter
- separation column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/281—Sorbents specially adapted for preparative, analytical or investigative chromatography
- B01J20/282—Porous sorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/60—Construction of the column
- G01N30/6052—Construction of the column body
- G01N30/6069—Construction of the column body with compartments or bed substructure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/60—Construction of the column
- G01N30/6052—Construction of the column body
- G01N30/6073—Construction of the column body in open tubular form
- G01N30/6078—Capillaries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/50—Aspects relating to the use of sorbent or filter aid materials
- B01J2220/54—Sorbents specially adapted for analytical or investigative chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/80—Aspects related to sorbents specially adapted for preparative, analytical or investigative chromatography
- B01J2220/84—Capillaries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/50—Conditioning of the sorbent material or stationary liquid
- G01N30/52—Physical parameters
- G01N2030/521—Physical parameters form
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
- G01N2030/8859—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample inorganic compounds
- G01N2030/8863—Fullerenes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/60—Construction of the column
- G01N30/6004—Construction of the column end pieces
Definitions
- the invention relates to a separation column for examining gases according to the Preamble of claim 1.
- Such a device is used for example in the analysis of natural gas and its Determination of calorific value an application.
- a separation column which is designed as a capillary is already known. She is with one Backing material filled in the form of balls, which are made of carbon, and have a diameter of 150 to 200 ⁇ m.
- the separation column has a diameter of a few millimeters. Their length is several meters. With this column the inert gases contained in the natural gas can be determined by those with a calorific value Separate fractions so that the calorific value of the gas to be examined can be determined is possible. It takes five minutes to take the measurement while about 15 ml of carrier gas per second must be flushed through the separation column. In microtechnology, more and more separation columns are needed to ensure fast To carry out an investigation of gases.
- the separation column described above is a lot dimensioned too large to find an application there. For devices whose dimensions are in the millimeter range and for which a suitable separation column is required in addition, a storage of larger amounts of carrier gas for each examination not possible.
- the invention has for its object to show a separation column, its dimensions are only so large that they can be integrated into any device in microtechnology can, and is also able to split natural gas into all components individually, so that its calorific value can be determined from it.
- the separation column according to the invention is designed as a thin capillary. She has a Length of about 30 mm and an inner diameter of 150 to 200 ⁇ m. She is with a carbon separator.
- the carbon is in the form of spheres that have a diameter between 150 ⁇ m and 180 ⁇ m. Will the diameter of the balls is chosen larger, so the distance between the inner diameter the capillary and the balls are too small.
- the separation column then becomes very sensitive against bending stresses and can break. To a complete split To reach natural gas in all its components, the bullets must be made Carbon can be arranged in a very specific form within the capillary.
- An optimal function of the separation column according to the invention is then achieved when all balls are lined up in a row, so that no balls next to each other lie, but each ball is arranged individually along the axis of the capillary.
- This structure ensures that natural gas is broken down into methane, carbon dioxide, Nitrogen, helium, hydrogen sulfide and arsenic compounds as well as higher ones molecular hydrocarbons such as ethane, propane, isobutane, butane and hexane are broken down as far as they are all included.
- each of the closures is formed by a capillary whose inner diameter is smaller than the diameter of the balls, and one end of which is in the end of the Separation column inserted and connected gas-tight.
- the closures with the separating column used an adhesive in the form of epoxy resin. Since the two closures at the ends of the separation column are designed as capillaries are, it is possible to test the gas and also the carrier gas without Difficulty introducing into the separation column. In addition, the components or eluents into which the gas to be examined is split in the separation column will, like the carrier gas, emerge unhindered at the second end of the separation column.
- the maximum separation performance of the separation column ie its highest number of plates, is reached at a flow of approximately 5 ⁇ l / sec if hydrogen is used as the carrier gas. Natural gas is separated into the components CO 2 , methane and air in less than 16 seconds if the temperature is increased from 0 ° C to about 50 ° C during this time.
- the flow area of the high number of beds can be enlarged downwards if an inert powder in the form of Buckminister Fullerene C 60 is stuffed between the individual balls of carbon.
- a powder made of carbon can also be used, which is also used to produce the spheres described above.
- a powder of carbosphere carbon is also suitable for this.
- the separation column according to the invention the possibility of changing the flow rate while maintaining the number of trays according to other, independent Set criteria.
- a criterion can, for example, be a specific one Flow, which is an additional separation column or another component needed, or which is upstream of the separation column according to the invention.
- the separation column according to the invention is for use in microsystem technology intended.
- the separation column can therefore also directly in a carrier element train with which a variety of components of microsystem technology can be combined into one unit.
- Such support elements are provided with a plate and a lid made of glass or silicon.
- the Lid delimits the surface of the plate from the outside to be gas-tight.
- a channel is formed in the surface of the plate.
- the channel is with widenings provided, the diameter of which is slightly larger than the diameter of carbon balls. In each widening of the channel there will be one Carbon ball arranged.
- the channel is in front of and behind each widening tapered to a diameter no larger than the inlet opening of the channel.
- the diameter of the channel is not larger in the area of the widenings than the inside diameter of the capillary described above.
- the channel also has that Capillary length.
- the channel partially in the lid and the surface of the plate train.
- the lid is then replaced by a ball in the channel is to be arranged, also provided with a deeper recess, the channel is also tapered in front of and behind each widening. So it can also be done on this Formed a separation column as described above.
- the partial training of the Separating column in the lid and the plate has the advantage that the recesses are neither have to be formed as deep in the cover in the plate as is the case, if the separation column is only formed in the surface of the plate. So that can the lid and the plate are made thinner.
- the first end of the separation column is so wide open that a gas to be examined and a carrier gas enter the channel can be initiated.
- the second end of the channel can be connected to a detector be arranged in a recess in the plate can.
- the separating column 1 shown in FIG. 1 essentially consists of a capillary 2, Separating material 3 and two gas-permeable closures 5 and 6.
- the capillary 2 forms the core of the separation column 2. It is made of quartz glass, which is coated with polyimide, manufactured. In the exemplary embodiment shown here, its length is 30 mm. It also has an inner diameter of 200 ⁇ m. This is inside the capillary 2 Separating material 3 arranged. These are 3K particles that act as spheres are trained. The 3K balls have a diameter of 150 ⁇ m to 200 ⁇ m is. The diameter is preferably chosen to be somewhat smaller than 200 ⁇ m, otherwise Excessive bending stress acts on the separation column 1, and therefore break it can.
- the 3K balls are made of carbon or carbosphere carbon. She are arranged in the capillary 2 in such a way that all the balls 3K are arranged one behind the other are, so that their centers lie approximately in the longitudinal axis of the separation column 1.
- the Capillary 2 is provided with a closure 5 and 6 at both ends 2A and 2B. Both closures 5 and 6 have the same dimensions and are capillaries educated. The dimensions of the capillaries 5 and 6 are chosen so that their outer diameter correspond to the inside diameter of the capillary 2 or slightly is smaller. The inner diameter of the capillaries 5 and 6 is dimensioned so that it is in in any case is slightly smaller than the outside diameter of the balls 3K.
- the end of the capillaries 5 and 6 is inserted in the end 2A, 2B of the capillary 2. additionally Both capillaries 5 and 6 are permanently and gas-tightly connected to the capillary 2. They are preferably at the ends 2A and 2B with an adhesive 9 based on Epoxy resin attached. With the help of these two closures 5 and 6 it is possible to use one Carrier gas 7 and a sample gas 8, for example natural gas, to be introduced into the capillary 2. At the same time it is ensured that the carrier gas 7 and the components of the Natural gas 8, which are split off with the aid of the separating material 3, the capillary 2 also leave without the balls 3 being rinsed out.
- the second End 2B of the separation column 2 is a detector in the exemplary embodiment shown here 10 connected.
- the embodiment of the separation column 1 according to the invention shown in FIG. 2 differs from the separation column 1 shown in FIG. 1 and explained in the associated description only in that an inert powder 4 is additionally stuffed into the capillary 2 in addition to the balls 3K.
- the same components are therefore provided with the same reference numerals.
- the inert powder 4 is arranged between two successive balls 3K.
- the powder can consist of Buckminister Fullerene C 60 . Instead of this powder, it is also possible to use a carbon powder which is used to produce the spheres described above.
- the separation column 1 can also be located directly within a carrier element be trained in which other components of microsystem technology can be integrated.
- the component of the carrier element 12 is a channel 13 with a length of, for example 30mm trained.
- an expansion 13A is formed at the points where a ball 3K made of carbon in channel 13 to be arranged.
- the diameter each widening 13A is slightly larger than the diameter of the balls 3K, so that a carrier gas 7 and a sample gas 8 flow around and past the ball 3K can.
- the channel 13 is tapered so far in front of and behind each widening 13 that the Carrier gas 7 and the sample gas 8 can flow through.
- the balls 3K be held in the specified position.
- a ball 3K made of carbon is arranged in each widening 13A of the channel 13.
- a lid 15 made of glass or silicon is arranged so is connected to the plate 11 so that the entire surface 11S of the plate 11 is sealed gastight.
- the first end of the separation column 1 is so wide open that the carrier gas 7 and the sample gas 8 can be introduced.
- the second end the separation column 1 is connected to a detector 10, which is also in a recess the plate 11 is arranged. With its help, the evaluation of the investigating sample gas 8, which is, for example, natural gas, can be carried out.
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- Nanotechnology (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
- Fig. 1
- eine erfindungsgemäße Trennsäule,
- Fig. 2
- eine Variante der in Fig. dargestellten Trennsäule,
- Fig. 3
- ein Trennsäule, die in ein Trägerelement intgriert ist.
Claims (10)
- Trennsäule zum Untersuchen von Gasen, mit einer Kapillare (2), in welche ein Trennmaterial (3) gefüllt ist, dadurch gekennzeichnet, dass das Trennmaterial (3) in Form von Kugeln (3K) ausgebildet ist, die alle die gleichen Durchmesser aufweisen, und dass die Durchmesser der Kugeln (3K) geringfügig kleiner bemessen oder an den Innendurchmesser der Kapillare (2) angepasst sind.
- Trennsäule nach Anspruch 1, dadurch gekennzeichnet, dass die Kugeln (3K) aus Kohlenstoff oder aus Carbosphere Kohlenstoff gefertigt sind.
- Trennsäule nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Kapillare (2) einen Innendurchmesser von 200µm aufweist, und dass der Durchmesser der Kugeln (3K) 150µm bis 200µm beträgt.
- Trennsäule nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Kugeln (3K) so innerhalb der Kapillare (2) angeordnet sind, dass alle Mittelpunkte der Kugeln (3K) auf einer Geraden angeordnet sind.
- Trennsäule nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zwischen den Kugeln (3K) wenigstens bereichsweise ein inertes Pulver (4) angeordnet ist.
- Trennsäule nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das inerte Pulver (4) aus Kohlenstoff, Buckminister Fulleren C60 oder Carbosphere Kohlenstoff gefertigt ist .
- Trennsäule nach einem der Ansprüche 1 bis6, dadurch gekennzeichnet, dass die Kapillare (2) an beiden Enden mit je einem gasdurchlässigen Verschluss (5, 6) versehen ist.
- Trennsäule nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass beide Verschlüsse (5, 6) als Kapillaren ausgebildet sind, deren Außendurchmesser an den Innendurchmesser der Kapillare (2) angepasst sind, dass die ersten Enden einer jeden Kapillare (5, 6) in die ersten Enden (2A, 2B) der Kapillare (2) gesteckt und gasdicht sowie dauerhaft damit verbunden sind, und dass die Innendurchmesser der Kapillaren (5, 6) geringfügig kleiner als die Durchmesser der Kugeln (3K) ausgebildet sind.
- Trennsäule nach Anspruch 1, dadurch gekennzeichnet, dass in der Oberfläche (1S) der Platte (11) eines Trägerelements (12) ein Kanal (13) ausgebildet ist, der zur Aufnahme von Kugeln (3K) aus Kohlenstoff mit Aufweitungen (13A) versehen und vor und hinter jeder Aufweitung (13A) verjüngt ist, dass der Kanal (13) mit einem Deckel (15) nach außen gasdicht verschlossen ist, der ebenso wie die Platte (11) aus Glas oder Silizium gefertigt ist, und dass das erste Ende des Kanals (13) als Einlassöffnung für ein Trägergas (7) und ein Probengas (8) vorgesehen ist.
- Trennsäule nach Anspruch 1, dadurch gekennzeichnet, dass ein Kanal (13) teilweise in der Oberfläche (11S) der Platte (11) und dem Deckel (15) eines Trägerelements (12) ausgebildet ist, der zur Aufnahme von Kugeln (3K) aus Kohlenstoff mit Aufweitungen (13A) versehen und vor und hinter jeder Aufweitung (13) verjüngt ist, dass der Kanal (13) mit einem Deckel (15) nach außen gasdicht verschlossen ist, der ebenso wie die Platte (11) aus Glas oder Silizium gefertigt ist, und dass das erste Ende des Kanals (13) als Einlassöffnung für ein Trägergas 7 und ein Probengas 8 vorgesehen ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10100921 | 2001-01-10 | ||
| DE10100921A DE10100921A1 (de) | 2001-01-10 | 2001-01-10 | Trennsäule für die Untersuchung von Gasen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1223427A1 true EP1223427A1 (de) | 2002-07-17 |
| EP1223427B1 EP1223427B1 (de) | 2006-08-02 |
Family
ID=7670202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01129505A Expired - Lifetime EP1223427B1 (de) | 2001-01-10 | 2001-12-11 | Trennsäule zum Untersuchen von Gasen |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6576047B2 (de) |
| EP (1) | EP1223427B1 (de) |
| DE (2) | DE10100921A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10329535B4 (de) * | 2003-06-30 | 2007-02-22 | Sls Micro Technology Gmbh | Miniaturisierte Anreicherungsvorrichtung |
| DE102007031678A1 (de) * | 2007-07-06 | 2009-01-08 | Thermo Fisher Scientific (Bremen) Gmbh | Vorrichtung mit einer Verbindung zweier Kapillaren |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3522172A (en) * | 1966-08-11 | 1970-07-28 | Victor Pretorius | Chromatographic processes and apparatus |
| US4951503A (en) * | 1990-01-23 | 1990-08-28 | Niagara Mohawk Power Corporation | Method and apparatus for determining the heating value of a gaseous fuel |
| WO1994012432A1 (en) * | 1992-12-02 | 1994-06-09 | Commonwealth Scientific And Industrial Research Organisation | Gas purification |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3149941A (en) * | 1957-12-30 | 1964-09-22 | Cons Electrodynamics Corp | Chromatography apparatus |
| DE1258631B (de) * | 1962-05-04 | 1968-01-11 | Erwin Heine Dipl Chem Dr | Trennkolonne fuer die Durchfuehrung gaschromatographischer Analysen |
| US3796657A (en) * | 1965-05-11 | 1974-03-12 | V Pretorius | Apparatus for distribution separation processes,their manufacture and use |
| US4208284A (en) * | 1965-05-11 | 1980-06-17 | Hahn Hans H | Apparatus for distribution separation processes |
| US3662520A (en) * | 1969-10-24 | 1972-05-16 | Us Navy | System for gas analysis and molecular gas separator |
| US3630006A (en) * | 1969-11-05 | 1971-12-28 | Antonio A Sandoval | Spiral capillary gas chromatographic column |
| GB1399397A (en) * | 1972-10-05 | 1975-07-02 | Pye Ltd | Fluid flow control arrangements |
| US4399032A (en) * | 1982-09-22 | 1983-08-16 | Mott Lambert H | Chromatographic column terminator element and assembly |
| US4935040A (en) * | 1989-03-29 | 1990-06-19 | The Perkin-Elmer Corporation | Miniature devices useful for gas chromatography |
| DE4435015A1 (de) * | 1994-09-23 | 1996-03-28 | Hahn Meitner Kernforsch | Gepackter Restriktor für die Extraktion löslicher Stoffe |
| US6454840B1 (en) * | 1998-08-20 | 2002-09-24 | Siemens Aktiengesellschaft | Separation-column unit for a gas-chromatograph and method for making the same |
-
2001
- 2001-01-10 DE DE10100921A patent/DE10100921A1/de not_active Withdrawn
- 2001-12-11 EP EP01129505A patent/EP1223427B1/de not_active Expired - Lifetime
- 2001-12-11 DE DE50110606T patent/DE50110606D1/de not_active Expired - Lifetime
-
2002
- 2002-01-10 US US10/045,768 patent/US6576047B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3522172A (en) * | 1966-08-11 | 1970-07-28 | Victor Pretorius | Chromatographic processes and apparatus |
| US4951503A (en) * | 1990-01-23 | 1990-08-28 | Niagara Mohawk Power Corporation | Method and apparatus for determining the heating value of a gaseous fuel |
| WO1994012432A1 (en) * | 1992-12-02 | 1994-06-09 | Commonwealth Scientific And Industrial Research Organisation | Gas purification |
Non-Patent Citations (1)
| Title |
|---|
| FORGACS E ET AL: "RETENTION STRENGTH AND SELECTIVITY OF POROUS GRAPHITIZED CARBON COLUMNS THEORETICAL ASPECTS AND PRACTICAL APPLICATIONS", TRAC, TRENDS IN ANALYTICAL CHEMISTRY, ANALYTICAL CHEMISTRY. CAMBRIDGE, GB, vol. 14, no. 1, 1995, pages 23 - 29, XP000485510, ISSN: 0165-9936 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50110606D1 (de) | 2006-09-14 |
| EP1223427B1 (de) | 2006-08-02 |
| US6576047B2 (en) | 2003-06-10 |
| US20020100368A1 (en) | 2002-08-01 |
| DE10100921A1 (de) | 2002-07-11 |
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